Ytterøy
| Name | Ytterøy |
| Type | Steamer |
| GRT | 1,112 tons |
| Country |  Norwegian |
| Built | 1914 |
| Builder | Helsingørs Jernskibsvft. & Maskinbyg., Helsingør |
| Operator | Dampsk. A/S Øy (Klüver & Co.), Christiania |
| History |
U-boat attacks on Steamer Ytterøy
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Aug 1917 | UC 48 (Kurt Ramien) | Sunk | 10 miles ENE of Ile Vierge | 48° 44'N, 4° 29'W | Nantes - Cardiff | pitprops | 1 |
Position of attack on Ytterøy
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